.navigation-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 100;
  transition: all 0.3s ease;

  .nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;

    .nav-logo {
      .logo-text {
        font-size: 1.3rem;
        font-weight: 600;
        color: #1a1a1a;
        letter-spacing: -0.01em;
        font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
      }
    }

    .nav-menu {
      display: flex;
      gap: 2.5rem;
      align-items: center;

      .nav-link {
        text-decoration: none;
        color: #424245;
        font-weight: 400;
        font-size: 0.95rem;
        position: relative;
        transition: color 0.2s ease;
        letter-spacing: 0.01em;

        &:hover {
          color: #1a1a1a;
        }

        &::after {
          content: '';
          position: absolute;
          bottom: -8px;
          left: 50%;
          transform: translateX(-50%);
          width: 0;
          height: 1px;
          background: #1a1a1a;
          transition: width 0.2s ease;
        }

        &:hover::after {
          width: 100%;
        }
      }
    }

    .nav-actions {
      .subscribe-btn {
        background: #007aff;
        color: white;
        border: none;
        padding: 8px 16px;
        border-radius: 6px;
        font-weight: 500;
        font-size: 0.9rem;
        cursor: pointer;
        transition: all 0.2s ease;
        letter-spacing: 0.01em;

        &:hover {
          background: #0056cc;
          transform: translateY(-1px);
        }

        &:active {
          transform: translateY(0);
        }
      }
    }
  }

  // 滚动时的样式变化
  &.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 1px 10px rgba(0, 0, 0, 0.05);
  }

  @media (max-width: 1024px) {
    .nav-container {
      padding: 0 2rem;
    }
  }

  @media (max-width: 768px) {
    .nav-container {
      padding: 0 1rem;
      height: 56px;

      .nav-logo {
        .logo-text {
          font-size: 1.2rem;
        }
      }

      .nav-menu {
        display: none;
      }

      .nav-actions {
        .subscribe-btn {
          padding: 6px 12px;
          font-size: 0.85rem;
        }
      }
    }
  }
}